I am buying a 2018 RT scatpack and I will want to buy s tuner for it. I’m looking for suggestions as to what tuner would be the best and also what can I expect for HP gains. Car will be completely stock....for now

I just downloaded HP Tuners software (VCM Suite) to mess with onto a PC. There are some stock tunes it comes with, I was just navigating around it for now. Once I get my PCM back after the Recall is done, I am thinking seriously about having it unlocked. All I really want to do for now is raise the top speed from 155 to the max. (255), I know it won't go that fast but it won't be limited either. Turn off MDS, if I can find that parameter and lower the temp where the cooling fans turn on, after I install a 185 Degree T-Stat After copying my Scat Pack 1 PCM programming to use as a "Baseline".

Let me know if you want any stock Challenger tunes to review. I have an HPTuner device and have access to their Tune Repository.

I bought the HPTuner for my Impala (and learned enough to make a very significant difference in the way the car drives), but it's amazing how "different" the GM tuning is compared to the Dodge tuning. I don't think I'm going to mess with the tune on my 2018 GT. Don't want to risk the warranty implications.

But like I said, if you want some stock Challenger tunes to review - let me know - just need to know exact what year/model you are looking for.

IMO Diablo Sport tuners are very limited in terms of capability for the DIY'er but are more than adequate for tuning via email.

On a stock motor, you might be able to free-up some HP. Typically what I have seen are the tunes usually are tweaked to give better throttle response and to reduce the amount of timing being pulled (i.e. knock sensors are desensitized, tip-in timing retard is reduced...ect). Most tweaks are also done on WOT tables where NN (neural network) is no longer controlling things. Basically the stock tune is developed to have some safe operation and fuel economy in mind. With a custom tune you are trading off this for more power.

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You can datalog without the PCM being unlocked.
As far as tuners, it depends on how hands on you are, and what your tuner prefers.
I highly recommend Mike @ OST Dyno for tuning, and he is strictly HP Tuners nowadays.

Let me know if you want any stock Challenger tunes to review. I have an HPTuner device and have access to their Tune Repository.

I bought the HPTuner for my Impala (and learned enough to make a very significant difference in the way the car drives), but it's amazing how "different" the GM tuning is compared to the Dodge tuning. I don't think I'm going to mess with the tune on my 2018 GT. Don't want to risk the warranty implications.

But like I said, if you want some stock Challenger tunes to review - let me know - just need to know exact what year/model you are looking for.

I am still just playing but it looks like you could put the HP Tuners on a lap top and plug it in to the OBD port and download the stock tune from the car, pretty much without doing anything else. then Just need the PCM unlocked to upload any changes. Correct?

I have a 2015 R/T Plus 5.7l A8 With a Scat Pack 1 PCM.

Could I download that tune and the stock tune and then adjust the stock tune to match it and then load that onto my stock but unlocked PCM?

I am still just playing but it looks like you could put the HP Tuners on a lap top and plug it in to the OBD port and download the stock tune from the car, pretty much without doing anything else. then Just need the PCM unlocked to upload any changes. Correct?

I have a 2015 R/T Plus 5.7l A8 With a Scat Pack 1 PCM.

Could I download that tune and the stock tune and then adjust the stock tune to match it and then load that onto my stock but unlocked PCM?

No, the PCM has to be unlocked before you can pull the stock file.
You will also need to buy credits after the PCM is unlocked before you can tune it.

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